/Engine/Source/Runtime/Core/Public/Containers/UnrealString.h
Concatenate this path with given path ensuring the / character is used between them
reference to path
template<typename CharType, typename [TEnableIf](API\Runtime\Core\Templates\TEnableIf)< [TIsCharType](API\Runtime\Core\Traits\TIsCharType)< CharType >::Value >::Type *> [FString](API\Runtime\Core\Containers\FString) & operator/= ( const CharType * Str )